What are ios and android?

I know this is dumb, but I don't know what these are. Some games say play online then say you need to have whatever these are. I am confused. (I rarely play online games, but for LDW I could make an exception...)


Edited grammar in title.

iOS and Android are mobile operating systems - you can download these versions of the games for mobile phones or tablets that support these operating systems, or play the game on desktop computers (Windows and Mac). Finally, you can also play the game directly in Facebook on your computer.

@Keegan
Thank you.

I was about to report myself as I should have posted this in off-topic not general discussion; sorry.

Don't use Facebook, hope never to.

Having answered, this topic can be deleted if you want to keep things tidy.